Roller-screen for windows.



No. 740,033. r v PATENTED SEPT. 29, 1903. J. s. MQNAMARA. ROLLER SCREEN FOR'WINDOWS.

APPLICATION FILED JAN. 31, 1908.

i0 MODEL.

Y W g ITNEIBSEIS} NVEINTURL UNITED STATES Patented September 29, 1903.

PATENT OFFICE.

,JAMESS. MQNA ARA, or so TH EA s'roN, MASSACHUSETTS.

ROLLERiSCREEN 'FOR WINDO WS.

SPECIFICATION forming part of Letters Patent No. 740,033, dated September 29, 1903.

i Application filed January 31, 1903. Serial No. 141,243. (No model.)

To ctZZ whom, it may concern:

Be it-known that I, JAMES Soorrr MONA- MARA, ot' South'Easton, in the county of Bristol and State of Massachusetts, have invent-i ed certain .new and .useful Improvements in Roller-Screens for Windows, of which the fol lowing isa specification.

This invention relates toflexible screens: for windows adapted to be wound upon a roller when not in use and un'woundand ex-' tended for use as required.

The invention has for its object to provide certain improvements in screens of this char: acter looking to increased convenience and: efiectiveness. Theinventionconsistsintheimprovements which I will now proceed to describe andclaim.

Of the accompanying drawings, forming a part of this specification, Figure 1 represents a side view taken from the innerside of'a window equipped with a screen embodying my invention. Fig. 2 representsasection on line 2 2 of Fig. 1 looking toward-the right. Fig. 3 represents a section onlline 3 3 of Fig. 1. Fig. 4 representsasection on-1ine 4 4 of Fig. 2. Fig. 5'representsa section on line 5 5 of Fig. 2. Fig. 6 representsa section on line 6 6 of Fig. 2. Fig. 7representsasection online77ofFig..

The same reference characters indicate the same parts in'a'll the figures. V

In the drawings, or represents a- Windowcasing, b represents the upper sash, and cthe lower sash, the latter beingshown-in its raised" position.

d represents a roller journaledin brackets f, afiixed to the lower portion of the casing,

said roller having sprocket-wheels g affixed to its ends. To the roller cl is affixed one end of a sheet h, of flexible wire-screen material, said sheet being adapted to be wound on and unwound from the roller. end of 'the sheet h is secured'a stiffening, binder 2', preferably composed of a strip of sheet metal folded centrally upon itself at 81 and bent at 9 9 to form flanges 1O 10, which are separated sufficiently to receive between them the end portion of the sheet h, said flanges being soldered or otherwise suitably secured to the portion of the sheet between them. The horizontal portion between the To the opposite;

I fold 8 and the bonds 9 9 constitutes an operating-flange projecting inwardly from the window and adapted to be grasped. by the operator for the convenient raising andlowering of the screen. I

jj represent sprocket-chains engaged with the sprocket-wheels g and with correspondingidle wheels 70 k, journaled on studs m, affixed to the upper portion of the windowcasing. The sprocket-chains j are not continuous, one end of each chain being attached vat p, Fig. 7,. to the stiffener i and the other end to a springp, connected at p with said 'stifienen' The function of the chains is to communicate motion :from the stiifener t to the roller (1 to. wind up the screen when the stiffener is being moved downwardly. The object of the springs p is to compensate for the increasing diameter of the roll of screen material upon the roller (1 as the stiffener 'i is moved downwardly. If both ends of the chain were connected rigidlyor unyieldingly to the stiffener 'i, the apparatus would be practically inoperative, owing to the changes in the diameter of the accumulation of screen material upon the roll as the screen is being wound up. The progressive increase of the diameter of the accumulation of screen material on the rollerd requires a progressive decrease of the speed of rotation of the roller relatively to the speed of the downward movement of the stifiener i as the screendescends. If the upperend of the chain were rigidly connected with the stiffener, the chain would prevent this variation between the rate of move- -ment of the stiffenerand roller. Hence the chain-and-sprocket connection between the roller and the stiffener would be inoperative. It will be seen, therefore, that the springs enable the sprockets aud chains to be'substituted for a roller-rotatingsprin gas the means forimparting a winding-up rotation to the roller d. This sprocket-and-chain connection is much more durable and reliable than a spring associated with a roller and has the advantage ters, and the screen may be raised when the sash is down to obscure the view from without. I do not limit myself to the form of spring here shown nor to the direct connection of the springs to the screen, it being ob- Vious that the springs may be of any suitable form and may be arranged in any suitable way to permit the described operation. Each pair of sprocket-wheels and the accom panying chain are fllClOSGd in a casing composed of two sheet-metal parts 11 and n. The partn has a flat back piece 12, which is aflixed to the inner side of the window-casing and a flange 13, projecting from the casing. The part it has a central portion 14, parallel with the portion 12 and separated therefrom by studs m, interposed between the parts 12 and 14 and preferably afiixed to the part 12. The part it also has an inwardly-projecting flange 16 at one end and an upwardly-projecting flange 17 at the opposite end, the flange 16 bearing upon the window-casing, while the flange 17 is parallel with the flange 13 and is separated therefrom by a narrow space which receives one end of the screen It. The part it is secured in place by screws 0, which enier tapped orifices formed to receive them in the studs m. The roller (1 and the screen material wound thereon are concealed by a strip 8 of sheet metal having a flange .9 formed to bear on the lower portion of the casing and attached thereto by screws 3 the strip 8 being curved, as shown in Fig. 3, so as to extend inwardly over the roller (1.

I claim 1. The combination with a window-casing, of a roller journaled in bearings at one end of the casing and having sprocket-wheels at its ends, idle wheels journaled on the casing at points remote from the roller, a flexible screensheet attached at one end to the roller and having a stiffener at its opposite end, chains engaged with said wheels and connected at their ends with the stifiener, and vertical casings attached to the sides of the casing and formed to inclose the wheels and chains and the edges of the unrolled portion of the screensheet, each casing comprising, first, a flat strip 12 bearing on the casing and having outwardly-projecting spacing-studs m and a vertical flange overlapping the outer side of the screen, and secondly, a flat strip 14 having a vertical flange overlapping the inner side of the screen, and an oppositely-projecting flange bearing on the casing, the strip 14 being detachably secured to the spacing-studs.

2. The combination with a window-casing, of a roller journaled in bearings at one end of the casing, a flexible screen-sheet attached at one end of the roller and having a stiifener at its other end, and screen supporting and winding mechanism having provisions for supporting the stiffener at any desired height independently of the window-sashand for causing a movement of the stiifener in one direction to impart a winding-up rotation to the roller, said mechanism comprising a wheel fixed to rotate with the roller, an idler-wheel, and an endless flexible connection extending from the stiffener around both of said wheels, means being provided whereby said stiffener may be connected with the window-sash to secure a simultaneous movement of the sash and screen-sheet when desired.

In testimony whereof I have affixed m y signature in presence of two witnesses.

JAMES S. MONAMARA. Witnesses:

C. F. BROWN, E. BATCHELDER. 

